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| author | Anouk Van Laer <anouk.vanlaer@arm.com> | 2017-03-17 12:02:00 +0000 |
|---|---|---|
| committer | Andreas Sandberg <andreas.sandberg@arm.com> | 2017-11-20 11:03:03 +0000 |
| commit | c0d613adb4eca09c32aca1cc90f04c29574f69c6 (patch) | |
| tree | 1c2a0d26778d8b8ca3f0b359f990dc695156bf8f /src/cpu/o3 | |
| parent | d626f4f7aaa4d2c9f7ae1afc35577fa025b4de38 (diff) | |
| download | gem5-c0d613adb4eca09c32aca1cc90f04c29574f69c6.tar.xz | |
pwr: Adds logic to enter power gating for the cpu model
If the CPU has been clock gated for a sufficient amount of time
(configurable via pwrGatingLatency), the CPU will go into the OFF
power state. This does not model hardware, just behaviour.
Change-Id: Ib3681d1ffa6ad25eba60f47b4020325f63472d43
Reviewed-by: Andreas Sandberg <andreas.sandberg@arm.com>
Reviewed-on: https://gem5-review.googlesource.com/3969
Reviewed-by: Jason Lowe-Power <jason@lowepower.com>
Maintainer: Andreas Sandberg <andreas.sandberg@arm.com>
Diffstat (limited to 'src/cpu/o3')
| -rw-r--r-- | src/cpu/o3/cpu.cc | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/src/cpu/o3/cpu.cc b/src/cpu/o3/cpu.cc index 0695711f1..091c3a6ad 100644 --- a/src/cpu/o3/cpu.cc +++ b/src/cpu/o3/cpu.cc @@ -1031,6 +1031,9 @@ template <class Impl> DrainState FullO3CPU<Impl>::drain() { + // Deschedule any power gating event (if any) + deschedulePowerGatingEvent(); + // If the CPU isn't doing anything, then return immediately. if (switchedOut()) return DrainState::Drained; @@ -1186,6 +1189,9 @@ FullO3CPU<Impl>::drainResume() assert(!tickEvent.scheduled()); if (_status == Running) schedule(tickEvent, nextCycle()); + + // Reschedule any power gating event (if any) + schedulePowerGatingEvent(); } template <class Impl> |